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1answer
13 views

Are there fluid disconnects that sever just before the Curiosity or Perseverance rovers separate from their cruise stages or landers?

In this comment under an answer to Heating Perseverance components prior to deployment I wrote: I think (but can not find a source yet) that there is even a loop of "hot water plumbing" ...
1
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0answers
7 views

Difference between “mafic floor” and “olivine-bearing floor” in Jezero crater? (Perseverance landing site)

Figure 3: Main geologic units within Jezero crater shown on a basemap constructed from images from the High Resolution Imaging Science Experiment (HiRISE) camera onboard the Mars Reconnaissance ...
0
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0answers
12 views

Why Perseverance's landing ellipse straddled the cliffs in the river delta; why so ambivalent about the two different geologies?

The Perseverance landing site has now been named for Octavia E. Butler and from here there will be a meandering climb to get up on top of the "cliffs" that are in the delta. I think that ...
2
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0answers
28 views

Horizons ephemeris - how did they calculate that “Keplerian GM” value?

I’ve been playing with the NAIF’s SPICE library for some time (CSPICE in particular). In order to obtain the state vector of an asteroid from its osculating elements, I’m calling the “conics_c” ...
1
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0answers
40 views

What happens at T-0 for the SpaceX Starship?

Every launch system defines a different event for T-0. The SpaceX Starship prototypes seem to ignite the engines at T-1.0 and accent seems to begin between T+1.0 and T+1.5. An overthrust abort for SN-...
2
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1answer
39 views

Perseverance drove for the first time on Mars ! (on Sol 14) Can I find somewhere how much and in what direction?

Image Credit: NASA/JPL-Caltech. The image was acquired on March 6, 2021. (Sol 15) Click on the image, and then again, for a closer view. Is there an (interactive) map that shows the route the ...
7
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1answer
575 views

I'm a 16 years Bangladeshi girl with a current height of 5fit 6inches. I've eyesight problem . Can I be a NASA astronaut?

I'm a 16 years old Bangladeshi girl.I want to be a NASA astronaut . Currently my height is 5fit 6inches and weight is 40kg.I've eyesight problem. Is that a big deal?
7
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1answer
430 views

Why was the SpaceX Starship SN10 slanted when it landed?

Why was the SpaceX Starship SN10 slanted when it landed? Was the landing pad uneven? Or did the Starship land a little way away from it? Or was this caused due to hull damage?
2
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1answer
64 views

Does the SpaceX Starship plan to have landing legs?

Does the SpaceX Starship plan to have landing legs? And if so, how many and where will they be located on the body of the rocket?
10
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1answer
363 views

How were STS SRBs disassembled

What was the process for disassembling the SRBs following their recovery? Was it broken down to the field or factory seal level of segments, and how was it taken apart?
2
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0answers
43 views

What do the double- or triple-checkers do when a launch is not scheduled?

Leading up to every manned launch, there is personnel dedicated to making sure their colleagues do everything correctly in accordance to checklists they usually have on hand. See for example the ...
3
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1answer
48 views

Heating Perseverance components prior to deployment

How is the heat generated by the MMRTG distributed to the operational parts of Perseverance prior to deployment?
2
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0answers
27 views

Is there an archive of the Satellite Times magazine from the mid-late 90s?

More of an misc. question. I am looking for the "Satellite Times" magazine which seems like it was in print in the mid-late 1990s. Part of the articles published there could be found at ...
0
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1answer
117 views

Starship: Maximum damage if hijacked and weaponised?

Any sufficiently advanced space technology is indistinguishable from a weapon of mass destruction, if misused. In the event that SpaceX lost control of a Starship to EvilHackers, what's the most ...
0
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0answers
32 views

How to convert to GEO cordinate from the Mars Solar orbital coordinate (Sun-state)

I am working on the planetary science (on Mars) project for my master thesis. I am using MAVEN data for analysis. Data (spacecraft position) are measured in MSO (Mars Solar orbital) coordinate. I ...
3
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1answer
375 views

Can you estimate the diameter of the marked small craters of Mars in the firsts HiRes pictures released by China?

I would like to know the diameters of the smallest craters that can be clearly distinguished inside the black circle (see the quite large size image below). Black-and-white picture of Mars taken by ...
7
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1answer
101 views

Rad-Hard vs Space-Hard computing

Radiation hardened CPUs like RAD750 are radiation hardened for up to 1000 gray. Cool. But, as CPUs have advanced way ahead their mechanical counterparts in miniaturization and fragility, energy ...
4
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1answer
129 views
+50

What is the cause of the horizontal drift in the ascend path of the Starship and other rockets?

As can be seen in the available videos on-line and in the following picture, as the rocket ascends, a horizontal drift in its path can be seen. I have forgotten the calculation of the Coriolis effect ...
0
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1answer
108 views

Trying to calculate Starship's ability to escape earth gravitational potential

The Wikipedia had the spectrum of SpaceX Raptor's specific impulse to be 330s at sea level and 380 in vacuum. Using an updated effective exhaust velocity at sea level to = 3280 m/s and in the vacuum ...
1
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1answer
85 views

would using both skyhooks and rockoons together be useful?

If my goal with a particular rockoon platform is not for it to reach space on its own but rather reach the lower end of some kind of some kind of skyhook, would the baloon part of the rockoon be more ...
35
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6answers
11k views

Why did the SpaceX Starship SN10 explode?

Much to everyone's relief. The SpaceX Starship SN10 successfully completed its flight and landed..... But, sometime later, It exploded! Why? And did it have anything to do with the fire near the ...
2
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1answer
48 views

attitude thrusters sharing a common combustion chamber

Most smaller satellites and other larger but simpler space craft with a less demanding mass fraction tend to use cold gas thruster, importantly with a common or as few as possible pressure vessels, ...
3
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2answers
134 views

Using lasers to reach the Karman line

I've just seen this Anton Petrov video: New Type of Laser Levitation Could Help Us Explore the Mesosphere. It's about this new form of levitation that uses lasers to heat up the air underneath a craft,...
6
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0answers
136 views

Shuttle had heat radiators, but Starship has none - why?

Heat radiators were a big deal for the Space Shuttle - once the bay doors were closed it was important to deorbit quite quickly. The SpaceX Starship doesn't appear to have specific radiator ...
0
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1answer
65 views

Wondering about materials [closed]

I am currently designing a Revit project on the planet Mars I was wondering what a wall on a base like structure need to consist of to protect its from the planet atmosphere. any thoughts ? regards, ...
2
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1answer
110 views

Could Four SRBs Be Stacked on SLS, Thereby Generating 17.9 Million LLBs Thrust at Liftoff

I'm not sure about the total thrust of SLS Block II (Crew Stack). So the math could be wrong. Since the Atlas 5 has a version where 4 SRBs are used, is this also possible for SLS?
3
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1answer
139 views

Why are Starship's tanks curved the way they are?

Since Starship has to feed its engines in two kind of situations : -during ascent, acceleration is colinear to Starship's longitudinal axis. -at the end of the belly dive, acceleration is normal to ...
1
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0answers
92 views

Time in Space (1 year in space, 7 years on earth?) [closed]

I heard that in certain parts in space, time will move faster than on earth. So they say 1 hour is 7 years on Earth. So what I would like to ask is if you have 1 hour in space, would you age the same ...
1
vote
1answer
61 views

How much of the total angular momentum of the Earth-Moon system is due to the Moon?

I've read that the total angular momentum of the Earth-Moon system is 3.41x10^41 g.cm^2/s (1). How much of that is due to the Moon? In other words, if the Moon ceased to exist and the Earth ...
4
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2answers
2k views

Why did Curiosity not have a camera on board to record the landing?

So we've had a question asking why Perseverance had a camera to record the landing and one asking if Curiosity did, but I can't find any information about why Curiosity did not have a camera on board ...
5
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2answers
133 views

What does it take to upgrade a radio antenna to receive from the surface of Mars?

All the discussion about receiving transmissions from Mars rovers got me thinking, what determines the capability of a radio antenna, and what goes into adding the capability of listening to a Mars ...
3
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1answer
100 views

Can Falcon 9's engines be ignited more than 4 times if there is enough TEA-TEB?

SpaceX's Falcon 9 uses TEA-TEB as a ignitor for its Merlin engines. My question is if the rocket has more TEA-TEB, can the engine be shut down and restarted more than 4 times?
2
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1answer
94 views

Why might particulate matter be shaken loose during Crew Dragon Demo-1 launch?

Here is the picture of Expedition 58 crew members enter the Dragon 2 of Crew Dragon Demo-1 for the first time. They are wearing protective gear to avoid breathing particulate matter that may have ...
14
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2answers
3k views

Can nuclear thermal engine designs be shutdown in such a way as to be restartable, in space?

Nuclear thermal rocket designs have a working temperature of 2000k or greater. Shutting such a reactor down won't stop that heat production instantly - it'll take quite some time to cool. Do current ...
10
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1answer
183 views

Feasibility of Liquid Water at Bottom of Valles Marieneris

Last night I was looking at NASA's equations for pressure and temperature of the atmosphere of Mars. P (in kiloPascals) = $0.699 \exp^{-0.00009 h}$ The Valles Marineris is 11 kilometers deep at it's ...
33
votes
2answers
4k views

Saturn V's external blueprints

I'm not sure if this is the right place to ask but I don't know where to ask. I want to get a high quality orthographic blueprints of NASA's Saturn V rocket with dimensions and everything (I need it ...
-10
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1answer
175 views

Even small countries have a few ~30 m diameter parabolic antennas but nobody reported signals coming from the landers on Mars. How is it possible? [duplicate]

The parabolic antennas with diameters of ~30 meters are all over the world. Even small countries have them. However, nobody, except DSN or other entities controlled by the US government, has ever ...
4
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1answer
134 views

Regulations for cubesats designed to survive reentry and be retrieved?

I'm currently thinking about the potential of manufacturing certain items (ZBLAN, Semiconductors, Organs, Drugs, etc.) in LEO and I want to know whether it would be possible/legal to design a cubesat ...
6
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0answers
114 views
+100

What makes Insight's RAD750 processor so radiation resistant? (compared to 1998 iMac's PowerPC 750)

Gizmodo's A 1990s iMac Processor Powers NASA’s Perseverance Rover references NewScientist and says: However, there’s a major difference between the iMac’s CPU and the one inside the Perseverance ...
2
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3answers
142 views

Why can Amazônia-1 observe the Amazon “every day or two” while Landsat takes 16 days between observations? Is “orbital magic” at play here?

The news item in Science Brazil’s first homemade satellite will put an extra eye on dwindling Amazon forests says: Right now, Brazil’s Amazon monitoring program relies on flyovers from the U.S. ...
17
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1answer
3k views

Did the Perseverance and Curiosity skycranes land gently, or did they crash?

I don't think I found any references as to further fate of the skycranes after detaching the rovers other than them "flying away" from the rover. Does NASA make any minimal effort to land ...
2
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0answers
92 views

Was the Apollo Programme the best option for long term space exploration?

Let us take the following as axiomatic: The long-term future of humanity is dependent upon the successful colonisation of space, The Apollo Programme was the greatest technological achievement in ...
9
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4answers
4k views

Is Perseverance unable to move?

The wheels show no sign of use, there are no wheel tracks in any of the raw images, and the where-is-the-rover page shows no movement from Sol 0. Why not?
6
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1answer
147 views

How long will the “Send Your Name to Mars” chips aboard the Mars Landers and Rovers last?

I'm talking about the Chips NASA has placed on Curiosity, InSight and Perseverance: You could enter you name on https://mars.nasa.gov/participate/send-your-name/future and NASA etched your name on ...
10
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1answer
871 views

What is all this about? (photo of several small cup-like structures on top of Perseverance)

I have been trying to figure out what this arrangement is for. Could it be where the mast had its 'face' buried prior to deployment? The various cups seem to fit exactly with lenses and positioning ...
3
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0answers
102 views

Can anything at Mars speak 900 MHz ZigBee besides Ingenuity helicopter and Perseverance rover?

Interest is piqued by What could be strong arguments against Ingenuity following Perseverance at a safe distance when the flight test program has been a success? Question: Can anything at Mars ...
1
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2answers
62 views

Ephemeris output from Skyfield

Is it possible to use Skyfield to propagate a TLE forwards and then output its ephemeris, rather than geometric x,y,z at some point in the future? I've worked through the examples in the API and may ...
9
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0answers
146 views

What could be strong arguments against Ingenuity following Perseverance at a safe distance when the flight test program has been a success?

This answer to the question "How long could the Mars helicopter Ingenuity keep up with the Perseverance rover if it wanted to?" reasons that indeed it could for years ! But according to the ...
2
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0answers
66 views

Would Mars become habitable to life if the sun starts to expand into a red giant? [closed]

If the sun expands then the distance between the sun and mars would become shorter. Thus more heat would reach Mars and perhaps the polar icecaps would melt. Could this lead to a thicker atmosphere ...
1
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0answers
205 views

What keeps galaxies together? [closed]

The super massive black hole at the centre of Milky Way has a mass of about 4 million times that of our sun. Is this enough to keep the entire galaxy together, is it this black hole which keeps the ...

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